Starting Resistance Coil Rebuild

 

Antique Auto Club of America post on Starting Resistance Coils

Ammeter Shunt Cleanup

 

Lighting Cut Off Switch cleanup

Before 

Insulating red lacquer behind switch plate

Below you can see where an insulating red colored lacquer was applied to depressions in the switch plate behind the contact mounting screws.  Dale, our resident electrical expert recognized this immediately as a substance called Glyptal.  We were able to buy some as it is still used to insulate coil windings in electrical motors.  As you can see below, there are a few fuses.  The writing is not legible so we'll take a guess.

After

Reverse Switch Cleanup

Before

After

During

The 100+ year old Bakelite insulating back plate and a few of the terminal connector insulators were broken.  So we 3D printed new backplate and terminal insulators.  There insulating components were printed in PETG which has a resistivity higher than the original Bakelite and should be able to withstand the heat generated in these high current circuits.